I'm surprised when creatives can't handle this type of criticism (if you can call it that). If someone makes a hateful and/or flippant comment about your work they probably socially immature or an actual child , so why take it to heart? You cannot reason with them, call them out, shame them or make any sort of intelligent rebuttal that will land with them. None of that works because don't care and are probably just making a drive-by comment anyway. The thing is, there valid reason to critique the art style. I bet if someone had privately posted the character designs in a community of professional designers they would get lots of sensible suggestions on how to improve the designs (I suspect its more about proportionality of the facial features than any other choices). Art is subjective, yes, but there are tried and tested scientific principles that underpin good character design. Its not surprising how collective this response has been when you consider that when it comes to faces, you are not just dealing with artistic taste but also our shared lizard-brain perceptions of what a human aught to look like.